Airtel — 4g network error

My no. Is [protected] nd m a airtel 4g user with 4g support handset mi note 4. I am currently staying at narayangaon tal - junnar dist-pune 410504 nd i can't get continue 4g lte network. It gets disturb time to time nd comes back to 3g nd 3g network doesn't even give slight of data
I request you to pls see through my complain coz it has got me troubled mentally quite alot now. Or else i have to really port my no. To another company coz this is 2/3rd time m complaining abt the same.